Cook County Value

999 Lake St, Winnetka, IL 60093

4 bed / 4 bath, 3,823 sqft, built 1979, in New Trier. Assessor market value for 2026: $1,947,710.

Cook County account 05171120190000

Assessor market value
$1,947,710
Tax year 2026 · before exemptions; the assessed value on your notice is 10% of it
Living area
3,823 sqft
$509 per sqft
Year built
1979
Average quality

Compare this assessment

Start with the county value and property facts, then review appraisal comps, recent sales, and prior-year changes to decide whether the assessment is worth challenging. The comps on this page are free to review; email sign-in is only used to save a printable report.

For nearby context, browse ZIP 60093 and New Trier assessment pages.

Local guide: New Trier Township 2026 Property Tax Appeal Guide.

Appeal deadlines

The 2026 appeal windows for New Trier have closed (Assessor , Board of Review ). 2027 notices usually start in March.

Deadline rule: Set by township: file with the Assessor by your township's last file date, and with the Board of Review while your township is open there. Evidence is reviewed by the Cook County Assessor's Office or, in a separate appeal, by the Cook County Board of Review. Dates checked against the official source.

Assessment snapshot

These public CCAO records highlight what may be worth checking before you file.

  • Assessment changeThe assessor market value decreased 9.4% from $2,150,000 in 2025 to $1,947,710 in 2026.
  • Assessor market value per square footThe current public record shows about $509 per square foot before any comparable-property adjustments.
  • Nearby comparison areaThis page starts the equity review with public records for the New Trier neighborhood and ZIP 60093.
  • Neighborhood value signalAmong 1,469 residential records in the same neighborhood, the average assessor market value is about $518 per square foot.
  • Area year-over-year signalNearby residential records with prior-year values moved about -3.0% on average.

Comparable assessments

Similar public appraisal records selected for this property's equity comparison.

  • 567 Oak St, Winnetka, IL 60093
    3,802 sqft | $524/sqft | built 1970 | Similar size (3,802 vs 3,823 sqft); Similar lot size (11,550 vs 11,520 sqft); Same quality (Average)
    $1,992,330
  • 420 Sheridan Rd, Winnetka, IL 60093
    3,638 sqft | $528/sqft | built 1970 | Similar size (3,638 vs 3,823 sqft); Similar lot size (11,004 vs 11,520 sqft); Same quality (Average)
    $1,920,000
  • 854 Bryant Ave, Winnetka, IL 60093
    4,031 sqft | $578/sqft | built 1970 | 5% larger (4,031 vs 3,823 sqft); Similar lot size (11,250 vs 11,520 sqft); Same quality (Average)
    $2,330,000
  • 519 Cherry St, Winnetka, IL 60093
    3,951 sqft | $491/sqft | built 1969 | Similar size (3,951 vs 3,823 sqft); Similar lot size (11,224 vs 11,520 sqft); Same quality (Average)
    $1,940,000
  • 334 Woodland Ave, Winnetka, IL 60093
    3,748 sqft | $584/sqft | built 1992 | Similar size (3,748 vs 3,823 sqft); Lot 11% larger (12,750 vs 11,520 sqft); Same quality (Average)
    $2,190,000

Recent comparable sales

No usable comparable sales are available in this data snapshot.

Public appraisal comparison for 2026. Prepared . Appraisal source: Cook County Assessor's Office. Sales data checked in this snapshot: . Showing the last prepared sales evidence while recent sales are refreshed. Matches consider available size, age, location and property characteristics. How comparisons work.

Value history

Down 9.4% in 2026 from 2025.

Assessor market value by tax year, with the change from the previous year listed
Tax yearAssessor market valueChangeChange %
2026$1,947,710−$202,290−9.4%
2025$2,150,000+$981,610+84.0%
2024$1,168,390$00.0%
2023$1,168,390$00.0%
2022$1,168,390−$36,810−3.1%
2021$1,205,200$00.0%
2020$1,205,200——
6-year total+$742,510+61.6%